Power Supply 1937 Bally Arlington


By Flippingout

4 weeks ago


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  • Latest reply 2 weeks ago by Flippingout
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    #1 29 days ago

    Hi All, I'm brand new to Pinside so I'm hoping I'm in the right place for this question:
    Recently I've bought a 1937 Bally Arlington, it's an old "one ball" payout machine in very good shape. However, the "Electropak" transformer/power supply seems to be shot and is only putting out 2 V where it should be putting out 12V DC. I have no schematic and the game seems fairly rare as there are no known instances of ownership on the ipdb. I think it may be similar to the Bally Rocket (payout mech is the same).
    My question is this, does anyone have a suggestion as to a power source replacement? The Electropak is a 115AC to 12V converter with selinium rectifiers. I've included a couple of pics, any help is appreciated.
    Thanks

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    #2 29 days ago

    Replacing the selenium portion with a silicon rectifier. There should be an AC output that you can tap directly into for the input on the silicon bridge, then take the output from the selenium rectifier and put it on the output of the silicon.

    You'll have to trace wires and poke with your meter to figure out what's what, but it should not be too tough.

    I would put a fuse on the input side of the bridge as well, while you're modifying stuff. The exact value is going to depend on the current that needs to pass into the bridge. At max, the payout circuit is running and it's shooting out $$, turning a motor. You may have to experiment till you find the fuse value that works - start with 2A and go up. It is, of course, possible to use math to find the appropriate value as well.

    1 week later
    #3 17 days ago

    Thank you for the advice. I found someone to rebuild the selenium rectifiers ($180) and will be installing it this week, fingers crossed.

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